If you don't have at least basic knowledge about it, it's not possible to explain here how to create an app. I suggest you to learn about developing apps from android developers site: http://developer.android.com

As you're probably aware, writing apps for Android is more than just learning code syntax. If you've never learned to code, you can check out plenty of resources online. However, there are still a whole host of tools and resources you might not be familiar with that you may need to make Android apps.